Atomic Structure Chemistry AQA GCSE

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  • Created by: Caitlinyx
  • Created on: 24-04-13 22:12
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  • Atomic Structure
    • Atoms
      • Nucleus
        • Neutrons - a neutral charge
        • Protons - a postative charge
      • Electrons - a negative charge
    • Atomic Number and the Periodic Table
      • The number of protons is the atomic number
      • The elements on the periodic table are arranged in atomic number order
      • If you are told the atomic number is 8, it has 8 protons and is the 8th element on the table, so it is oxygen
      • You read the table from left to right, from bottom to top
    • Mass Number
      • The number of protons and neutrons in the nucleus is called the atomic mass
      • If an element has 4 protons and 5 neutrons, it has an atomic mass of 9
      • Given the atomic number and the mass number you can work out how many protons, neutrons and electrons an element has
      • Number of neutrons = Mass number - Atomic number
  • Overall charge 0
    • Protons - a postative charge
    • Neutrons - a neutral charge
    • Electrons - a negative charge

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